William d



PRINDLE 6L YERK.

Churn. A

Patented Jan. 29, 1867.

'In l WILLIAMD. PRINDLE, AND CHARLES M. YERK, 0F A'1IFFI1 \I, OHIO.

Leners Patent No. 61,567, 1aed am@ 29, 1867.

IMPROVEMENT IN ATMOSPHERIC UHURNS.

To ALL .wHoM rr MAY coNcERN:

Be it known that we, WILLIAM D. PnrNDLnand CnAnLns M. YERK, of Tiffin, Seneca county, Stateof Ohio, have invented a new and useful Improvement in'Atmospheric Churns; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had tothe accompanying drawings, making a part of this specifcatiominw'hichs l Figurel is a side elevation of the churn.

Figure 2 is a vertical central section through the churn.

Figure 3 is a .top view ofthechurnwith the bellows removed.

Figure 4 is a side view of the'movable perforated diaphragm, water-chamber, and air pipe.

Similar letters of reference indicate corresponding parts in the several figures.4

This invention relates to certain improvements on that class of churns which are denominated atmospheric churns, for the reason that air is injected through the cream for the'pu'rpose of agitating and breaking np the butter globules. The object of our inventionis'to employ, in conjunction with a churn-bex and bellows, an airpipe leading to the bottom of said box, and having connected to it a perforated diaphragm and a water-chamber; said pipe being constructediwith its lower end perforated so that the air will be discharged therefrom below the diaphragm, and caused to rise through it and to be divided in to numerous streams, so as .to thoroughly agitate the eream,as will be hereinafter described.

4To enable' others skilled in the art to nnderstandour' invention, we will describe its construction and operation.

Inthe accompanying drawings, A represents the churn-box, B the cover thereof, and C a bellows, which is used for forcing air through the cream. This bellows C i has. a lever s ecured' to its top board, which lever is 'pivoted at one end to a standard, A', that is secured to the churn-box, as shown in figs. -1 and 2. The inletvalve a is applied to the top board of the bellows, and the inlet piped` is applied to the bottom board, and passes down through the top or cover of the churn, through a large opening which is made through this cover. The

bottom board of the bellows, C, is secured to a narrow board C', so that by removing the pin which connects the lever E to the standard A', the bellows can be removed' without removing the cover B. Within the churn-box A is a pipe, b', into which fits the inlet pipe b, as shown in the drawings. This pipe b extcndsto thc bottom of the churn-box, and is supported thereon; its lower end is perforated'with numerous small holes, `as shown at c, for the escape of air forced down from the bellows. A short distance above the lower end of pipe o', and secured centrally to it, is a perforated diaphragm F, which is nearly equal in diameter to the interior diameter of the churn-box, and which has a flange or rim, ol, projecting up from its outer edge so as to form a vessel for the removal of the butter. Above this diaphragm F, a cylindrical vessel, G, is securedl centrally to the pipe b', for containing hot or cold water, as may be required. The pipe'b' is held in place at its upper end bythe short pipe 4l5, and at its lower cud by the diaphragm F, so that by removing the bellows C and cover B, the lpipe b',

with its attachment, can be lifted ont of the churn-box. 'When the parte areall in place, as shown in g. 2, and

-the churn-box filled with cream, the level of the cream being below the top of the water-chamber G, the bellows C is worked and air forciblyinjected into the churn-box below the diaphragm F, a's indicated by the arrowsv in iig. 2. As the streams of air rise, they pass through the perforations which are made through .the diaphragm F,

and are again divided and distributed into the body of cream above the diaphragm. This division and distribu-- tion of the air cause a thorough agitation of thc cream in the churn-bornand rapidly produce the butter. The bellows C and cover B are then removed, and the butter taken out of the churn-box in the diaphragm F, which becomes a strainer for gathering the floating particles of butter, and allowing the buttermilk to pass through it.

Having described our invention, what we claim as new, and dcsire'to securcby Letters Patent, is

1. In combination witharnovable bellows, C, which is applied on the cover B of the churn-box, we claim the pipes b b', perforated diaphragm F, and water-chamber G, arranged substantially as described.

2. The construction of the air pipe b', with a perforated foot c, a perforated and flanged diaphragm F, and a water receptacle, G, upon it, to be used substantially as and for the purposes described'.

WM. D. PRINDLE, C'. M. YERK.

Witnesses:

G. F. BnINKnRnorr, D. J. GoonnnLr.. 

